Have you tried this?
https://support.google.com/drive/answer/2494822?hl=en
Other ways to share
Share a link to a file or a folder
To give other people access to a file or folder, you can send them a link to open and access the item.
Sign in to Google Drive or a Docs, Sheets, or Slides home screen.
Open the file you want to get a link for.
Click Share for files or the share icon for folders in the top-right corner of the screen Share.
Click Get shareable link in the top-right corner of the sharing box. A link to the file will be copied to your clipboard.
Paste the link into an email or chat to share it.
To stop allowing people to access the file using the link, open the sharing box > click the dropdown menu below "Link sharing on" > choose OFF > click Done.
By default, the link you share will be view only for others. To allow people with the link to comment on or edit the file, click the dropdown menu under "Link sharing on" and change the setting from "People with the link can view" to "People with the link can comment (or can edit)".
To allow anyone to be able to open the file or folder using the link, make sure to change your sharing settings to “Anyone with the link” or “Public on the web”. Click Change… when you’re in the sharing box to change this setting.